Archive for August 2017

Teardown of a Philips Dimmable LED Bulb

I bought six Philips dimmable LED bulbs for my dinning room chandelier last year. These are 45W incandescent equivalent (7W, 450 lm 2700K) and are supposed to provide years of trouble-free illuminations. Over the course of a year of light use however, they all exhibited the same failure mode at some point of time. Two months in, the first bulb failed. The bulb would initially turn on, but after a few minutes it would turn off by itself. If the power is recycled the light can be turned back on again but only for a short period of time, and the cycle continues. Continue reading ‘Teardown of a Philips Dimmable LED Bulb’ »

Converting Celsius to Fahrenheit – The Analog Way

I have an old Keithley 1301 temperature probe. This probe is an accessory to the Keithley 130A/131 multimeter and is capable of measuring temperatures between -55°C to 150 °C. Since it outputs an analog voltage linearly proportional to the temperature (1mV/°C), it can be used with any multimeter that has a mV range. Continue reading ‘Converting Celsius to Fahrenheit – The Analog Way’ »

More Information on BSide ACM03 Plus Clamp Meter

In my previous post, I did a review and teardown of a cheap BSide ACM03 Plus clamp meter and concluded that it was a surprisingly good meter despite a few minor annoyances. Continue reading ‘More Information on BSide ACM03 Plus Clamp Meter’ »